Aliens have received a bad rap in popular culture, what with the stories of anal probing. As Paul said in the movie of the same name: “What are we doing? Harvesting farts?”
No, they’re simply stopping by Earth to get a quick feed. Because where else in the universe can you find tasty pork products like bacon?
This would also explain the rash of missing picnic baskets…and irate bears wearing hats and ties.